Temperature control



' June 28, 1927. 1,633,680

J. J. SCHLOSSER TEMPERATURE CONTROL Filed Feb. 2, 1926 fi 1a. 1

I N VEN TOR.

JOHN I 5 on 0556K.

ATTORNEYi lit) Patented June 28, 1927.

UNITED STATES PATENT GFFICE.

JOHN J. SCHLOSSER, ()1? FRANKFORT, INDIANA, ASSIGNOR TO SCHLOSSER BROTHERS, OF FRANKFORT, INDIANA, A CORPORATION.

TEMPERATURE CONTROL.

Application filed February This invention relate to :1 Paste/mixer or the like and a thermostatic control therelor, wherebv the temperature therein is maiutainetl at :1 preileiermincil temperature The ehiel feature ot the invention eonsirts in the provision ext means for supplyin heat to a Pasteurizer compartment or tonlainer. and associated therewith a coniroller mechanism for maintaining said compartment or the like at a predeterminetl tem perature below which the ten'lperatu're will not fall antl above which the temperature will not rise appreciably.

The chief feature of the invention eonsists in the association of heat supplying means, a power circuit controlling" the same antl a pilot circuit for controlling the power circuit and thermally responsive to tempera-- ture conditions whereby autmnatie control of the power eircuit is secureil.

The full nature of the invention will be milerstooil from the accompanying 1lrawingrs aml the following); tlescriptii'm aml laims in the drawings Fig. l is an elevational view of a mechanism showing; the several lines connected thereto tll1(l the immetliate control means associateil therewith. Fig. 2 is a wiring diagram of the control circuit antl the parts in'imetliately afssOCitltPt'l with the apparatus shown in Fi e. 1.

This invention is an improvement upon that baeicly tliselosetl in the copentlii'ig application entitled 'lhermostatie control, trierial No. 4 3 25 tltltttl July 13. 1 25. and asifl'lletl to the assin'uee of this applicatirm.

In the drawings '10 indicates a Pte teuriZeI chamber to which is connected another pasteuriaer chamber 10 by a lin ll leading 'l'rom the top of the first to the bottom ot' the second. A supply line 12 anzl a dischartre line l3 are connected reepeetively to the bottom of the tirtst Pasteurizer chamber aml to the top of the second Pasteurixer chamber. A heat supply line 14 is eonnecteil to the top of the seconil Pasteurizer anrl the heat supply means is connected by a ilischarll'e line 171 to a suitahle trap 1th anal from theme by line lT to the first Pasteurixer. from which it ilischaroes throuah a line li to the discharge line 19 by way in" the rap 2h. The foregoing arran; -ement is what is commonly (tlllPtl reverse tlow. that the milk to be Pasteurized flows in one direction through the Pasteurizer. and the steam for heating or Pasteurizing flows in the opposite (lirectiom thus bringing the hottest: sleznn to the hottest milk, so that the heat exchange is attectetl most economically throughout the two lasteurizers since a relatively larger temperature tlllftl'ttltt! is possible by this arrangement than by a reverse arrangement.

In the eol'ltrolline line ll is a valve 21 and controlling saiil valve 21 is a relay or magnet :22. Positioned adjacent the, (lischarge 13 ttlltl reziponsive to the temperature of the i'lisehare'etl milk at this point is a thermally responsive mechanism in the term ol' :1 thermon'ieter switch 23.

Reference will now be lltltl to Fig. 2, wherein the control circuits are illustrated. It is to be lllltl(l:-tl()0(l that merely for convenience is the l'oregoing mechanism shown applietl to a lasteurizer construetiom for the same may be applierl to other structures such as culture cabinets. milk solitls testers. etc. In Fig. .3 the two supply mains are inilicateil by the numerals Ql aml 2F, and herein the same are connected to :1 suitable source of alternating current. The thermometer 23 inehules a terminal 26 connecteil by line 27 lo a signal lamp 255 in turn connected by line :29 to supply line 24. The thermometer also incluiles a terminal 30 connected by line 231 to the primary winding 3: ot a transformer, in turn conneii-tetl byline 33 to the Olltel' supply line 25. By having this winding 32 of relatively hitl'h resistance it will be apparent that the current flowing through the pilot or control circuit herein ileeerihetl. is relatively small and thus the thermometer mechanism herein shown is perfectly tltlttlllt'tl to open :llltl elo: e the ciw uit without ilamgjerous ellects such as are ing. Magnetically coupleil to the primary winding: is the secondary \vinilinq' 34 01" the t'ranr it'ormer. anil saiil whaling); is connected by lines 35 anil 236 to the serien connecteil relays 37 and 31 connected by :1 line :39; Thus the relay lllttllflllilll is in a ('l()--'t tl circuit aml in the seconilary ot the pilot or control circuit. Since the coils: 3T aml 3-8 are of relatively low resistance. the tran=: former is adapted to supply through the secontlary winding: a relatively low voltage. hie'h amperage current for power purpose= 'hen the thermometer circuit is closetl :he relays are tlttllltllttl which tilts the arnnr ture 41) on its pivot 41. Pivot 41 consists of loo a rock shaft upon which is also mounted a switch member 42, so that switch member 42 is movable with the armature it). The rock sha ft, or rather the switch member 42 is normally maintained in closed circuit position by a spring .43. Switch memlaxr 42 is adapt ed to normally engage contact it connected by line if) to one of the supply lines, to wit. line 25. Line 40 connects switch member 4; to the relay 22 connected by line 47 to a s nal lamp to. in turn winner-ted by line H) the other supply line :H.

It will be noted that when the thermommeter switch is closed the power switch is open and the thermometer switch indicating signal is energized, while the otlu-r signal is decnergizcd. (ouverscly when the ther monieter circuit is open. that is the switch open and the signal is deenergized. the power circuit switch is ctoscil and the power circuit signal indicator is energized. Thus one of the indicating intans is always cncr gized, and since they are ditlerentially operable indicate that the d vice is operative at all times. Failure of any of the indicaters indicates that one portion ol' the circuit. is inoperable. lt witl also be observed that in the present. form of the invention the thermally responsive switch and the power switch are also ditl'cren iallv operable. \Vhen the temperature in the Pasteurizer attains a predetermined degree. the remote control circuit is closed through the thermonieter switch. This energizes the series connected relays to open the power switch and decnergize the valve controlling relay 22 which deenergization of relay causes closing of the valve 21. 'hen the tien'iperature falls by reason of the cutting oil of the heat supply sutiicient to open the circuit through the thermometer switch. the series connected relays are deencrgized permitting spring 43 to close the power switch 42. thereby energizing the relay 22 which secures the opening of valve 21. Thus the power switch and the valve are differentially operable, while the valve and the thermometer switch are similarly operable. Closing of the thermometer circuit closes the valve and shuts ott' the heat supply and opening of the thermomcter circuit opens the valve and secures the heat supply.

The invention claimed is:

1. in a hcating system. the combination of a source of t-litl a stitlltt ot heat. a valve therctor. an etectrical circuit con nectcd to said sourie ol energy and controlling the \alve including a switch. an other circuit connected to the source of energy and including a ti mperaturc responsive switch. and a third circuit in 'netically conncctcd to the last. m ntioned circuit and including means iiiccliaiiicail v connected to said first mentioned switch for controlling the same, whereby said last mentioned cir cuit contro'is said first mentioned switch.

1.. device as detined by claim 1. charactcrizeil by the valve and first mentioned switch being i'litl'erentially operable. and the :-\\'litlltf% being diti'erentially operable and the valve and last mentioned switch being similarly operable.

:1. in a heating system. the combination of a source of energy. an independent source ot' heat. a valve controlling the supply therefrom. an electrical circuit connected to the source of energy and controlling the valve including a switch. said switch and valve being diticrcntially operable. and another circuit connected to the source ot energy and including a temperature responsive switch {or controlling said first; mentioned switch. said circuits being dil'l'erci'itially energized. a current energized indicating means in each circuit for indicating the operativeness of the circuit. said indicating means being alternately operable by reason of the differ cntial cnergization ot the circuits. whereby an indicating means is always energized for indicating the operativeness of the entire system.

In witness whereof, I have atiixed my signature.

JOHN J. SCHLOSSER.

hereunto 

